Plant Self-defense (image) University of Delaware Share Print E-Mail Caption A close-up of a plant cell. Using bioimaging techniques, a team of researchers from the University of Delaware and the University of California-Davis has shown that chloroplasts morph into dramatically different shapes when danger approaches, sending out hollow shoot-like parts called "stromules" as part of the plant's immune response. Credit University of Delaware/ Kathy F. Atkinson Usage Restrictions Must credit University of Delaware/ Kathy F. Atkinson Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.